An individual who is highly reluctant to invest time, money, or effort towards having an enjoyable evening/weekend. Expects others to entertain him, has a highly questionable taste in style. Also, a drost often has striking similarities to pizza hut employees and/or late 70's rock icons.

Friend #1: "hey man you wanna go out and have an adventure tonight?"
Friend #2: "actually I was considering taking a night off to catch up on my masturbation, and I don't have any money or alcohol"
Friend #1: "man why do you always have to be such a drost?"